Agree is Joann, she answered this question very nicely! I am going to input a a different style to this answer. It is most important to understand the goal to structure the exercise relative to the goal. This is just an input not based on scientific evidence but it backed by a theory. I do not believe in exercise training for explosive power. Obviously athletes and many sports require power as large component of their of play. I believe that that to fulfill the need of explosive power practice should incorporate and reinforce the explosiveness. When people bring explosive combined with using forces of resistance such as free weights, kettlebells, body weight suspension systems – injuries are at large. Therefore, I think lifts should be done in a more controlled manor to develop the musculoskeletal structure and neural pathways. Then once your body is developed explosive sport specific training should be applied (this is what I consider functional).
Again this is my theory/opinion and this not backed by literature but I think it is pretty safe to say that this way would significantly reduce injury in the fitness field.
Fuel the Movement